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SMITHSONIAN MISCELLANEOUS COLLECTIONS 



VOL. 72 



the exception of the savannas of the southern part of the country 

 ( Rupununi District) and a few other small areas, the whole country 

 is covered with dense virgin rain-forest. 



Communication in the interior is almost entirely by boat along the 

 numerous streams, but unfortunately is hindered by falls and rapids 

 aljove the influence of the tide (30 to 60 miles). 



Fig. 71. — A giant mora tree (Diniorpluutdra cxcclsa) in 

 the virgin forest of British Guiana, near Tumatumari. The 

 l)ase is broad and buttressed. Attached to the trunk is a 

 species of Marcgravia. 



The scientific activities of the colony are mainly under the control 

 of Prof. J. B. Harrison, Director of Science and Agriculture, who 

 extended to Mr. Hitchcock many courtesies. 



The Jenman Herbarium, an important collection of British Guiana 

 plants, is at the office of the director in Georgetown. There is an 

 excellent botanical garden with a large collection of trees and shrubs, 

 including a very fine series of |)alms. 



